Frederick L. Lewis is a retired American basketball player. He played professionally in the National Basketball Association (NBA) and American Basketball Association (ABA). He is the only player to start his career in the NBA, and play all 9 full ABA seasons (1967-1976) until the NBA/ABA merger, then sign back with the NBA.

The American Basketball Association (ABA) was a men's professional basketball league from 1967 to 1976. The ABA merged into the National Basketball Association (NBA) in 1976, resulting in four ABA teams joining the NBA and the introduction of the NBA 3-point shot in 1979.